Theosis is the goal of the Christian life in Orthodox theology: participation in the divine life. Athanasius summed it up in the saying that God became human so that humans might become god. Maximus the Confessor and Gregory Palamas developed it, holding that the deified share in God’s energies, not his essence.
Theosis
Deification: the Eastern Christian teaching that human beings are called to become by grace what God is by nature.
Also: deification, divinization